A 2.00 kg pendulum bob on a string 1.50 m long, is released with a velocity of 2.00 m/s when the support string makes an angle of 30.0 degrees with the vertical. What is the velocity of the bob at the bottom of the swing?
A. 4.32 
B. 4.00
C. 3.75
D. 3.04
E. 2.81
E. 2.81
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The spring force is larger
A. The more the spring is compressed B. The more the length is changed C. The more the spring is stretched D. None of these
Just as in hydraulic circuits there is water pressure, in electric circuits there is
A) current. B) voltage. C) resistance.
Define wave motion, and give an example
A space station out beyond the solar system is rotating with constant angular velocity. A spaceship heading into the station along a diameter of the station, uses its rockets to brake, and then docks inside the station at its center. When the spaceship docks, the angular momentum of the system consisting of the station and ship
A. is less than the original angular momentum of the station. B. is the same as the original angular momentum of the station. C. is greater than the original angular momentum of the station. D. is less than the original angular momentum of the station, but the angular velocity increases. E. is greater than the original angular momentum of the station, but the angular velocity decreases.